Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
In this work, molecular dynamics modeling is used to study the mechanical properties of PPTA crystallites, which are the fundamental microstructural building blocks of polymer aramid bers such as Kevlar. Particular focus is given to constant strain rate axial loading simulations of PPTA crystallites, which is motivate…
Conceptual Analysis for NanoscienceT he synthesis, characterization, and interpretation of nanoscale materials necessarily draw from both bulk and molecular descriptions of matter.Researchers choose which descriptions to use in order to understand and explain a given phenomenon.These choices are often intuitive and su…
In the present work, Pt nanoparticles were deposited by means of microwave synthesis on the primary carbon supported Nb2O5 composite which was prepared in two different ways: (A) by dispersion of Nb2O5 and carbon with the mass ratio equal to 1:1 in a 2-propanol solution by ultrasonication for 30 min. with further desi…
The adsorption and electrokinetic properties, as well as the stability of the mixed oxide suspensions in the absence and presence of poly(vinyl alcohol) – PVA were studied. Two alumina-silica-titania (AST) oxides were used: AST50 (TiO2 : 50 %, SiO2 : 28 %, Al2O3 : 22 %) and AST71 (TiO2 : 71 %, SiO2 : 8 %, Al2O3 : 21 %…
为研究不同碱度和浊度下抗生素SMZ(磺胺甲(口恶)唑)和OTC(土霉素)的混凝去除特征,选择PAC(聚合氯化铝)为混凝剂,并分别以碳酸氢钠、高岭土调节碱度[以ρ(CaCO3)计]和浊度进行混凝模拟试验.结果表明:当浊度为10 NTU时,SMZ和OTC的混凝去除率随着c(PAC)(以Al3计)的增加而增加;在碱度为100 mg/L、c(PAC)为0.35×10-3 mol/L时,浊度对抗生素的去除有一定的影响但不显著,对SMZ去除的影响大于OTC.c(PAC)为0 mol/L时,高岭土对目标抗生素的吸附去除率较低,表明对抗生素去除起主要作用的是PAC.碱度对SMZ和OTC的混凝去除率影响显著,这种影响是通过同时影响PAC的水解产物形…
Izvleček: Kristali, ki gradijo trdno fazo jamskega mleka, lahko zrastejo iz različnih raztopin kot posledica anorganskih in/ali organskih procesov. Terminologija, ki se uporablja za defi niranje keristalinske faze jamskega mleka je obsežna. Kakorkoli, če se kdo posveti široko sprejeti klasifi kaciji in terminologiji u…
Gallium lanthanum sulphide glass (GLS) have been widely studied in the last forty years for middle-infrared (MIR) applications. In this paper we report the results of the compositional substitution in GLS glass. The samples were prepared via melt-quenching method in an argon-purged atmosphere. A wide range of composit…
Artificial superhydrophobic films were deposited onto a glass slide by performing layer-by-layer deposition of 3.5 bilayers of poly(allylamine hydrochloride)/ poly(acrylic acid) polyelectrolyte, followed by a layer of SiO2 nanoparticles of various amounts to enhance the surface roughness and a fluorosilane to reduce t…
Ultrasonic absorption measurements in the frequency range from 0.2 to 8.2 MHz with emphasis on the low‐frequency range below 1 MHz were carried out for β‐cyclodextrin (β‐CD) solutions with ibuprofen and naproxen at 25°C. A single relaxational absorption was observed and the cause of the relaxation was attributed to a…
Catalysis![Figure][1] PHOTO: KULD ET AL. Copper nanoparticles can catalyze the formation of methanol from a mixture of CO2, CO, and H2, but adding zinc oxide nanoparticles, themselves inactive in this reaction, greatly boosts the rates. Kuld et al. measured how methanol synthesis activity
We report a room-temperature (RT) hydrogen gas (H2) sensor based on palladium-decorated single-walled carbon nanotube/Si (Pd-SWNTs/Si) heterojunction. The current-voltage (I-V) curves of the Pd-SWNTs/Si heterojunction in different concentrations of H2 were measured. The experimental results reveal that the Pd-SWNTs/Si…
Epoxy methacrylate of 1,1’-bis(4-hydroxyphenyl)cyclohexane has been synthesized and styrenated (EMAS) for the preparation of silica and calcium carbonate filled glass and jute composites. Both jute and glass composites displayed good tensile and flexural properties. Tensile strength is found to be improved, while flex…
A novel chromogenic, polymeric sorbent material Polyaniline picrate (PANIPI) has been synthesized by chemical oxidative polymerization and characterized using various spectral techniques. Cyclic voltammetry and four probe conductivity measurements have revealed that the polymer is highly electroactive. Surface morphol…
In this paper, Lafuente and Cuesta's cluster density functional theory (CDFT) and lattice mean field approximation (LMFA) are formulated and compared within the framework of lattice density functional theory (LDFT). As a comparison, an LDFT based on our previous work on nonrandom correction to LMFA is also developed,…
Abstract Collagen, the most abundant protein in human body, has been widely used as an excellent natural material for diverse biomedical applications due to its superior properties such as ample biological interaction sites, minimal immunogenicity and high biocompatibility. Collagens of different lengths are produced…
To arrest the normal cell abscission in mammalian cells, testis‐expressed gene 14 (TEX14) competitively binds to the midbody protein centrosomal protein 55 kDa (CEP55). To gain further insights into the interactions between CEP55 and TEX14 (or ALIX), we performed molecular modeling studies. Molecular dynamics simulati…
Se compro el material se mando a mecanizar segun normas en las que nos basamos, acto seguido se le realizaron los tratamientos termicos para despues hacer la pruebas como tension impacto y tenacidad para lo ultimo hacer nuestro analisis de resultados.
In this study, silk microstructures and the yellowing mechanism have been investigated to develop laser eco-printing technology for silk patterns (SLEP). Carbonized microstructures are divided into bar-shaped clots and sludge materials with small holes. The former are created by the initial pyrolysis (melting) of raw…
Polyether ether ketone (PEEK) mixed with manganese (Mn) of different valences was prepared to simulate conditions of impurity. The melt flow rate (MFR) and rheological behaviour were systematically studied to characterize the mobility from different angles. MFR test was used for the preliminary exploration of mixtures…
A new Mn(II) coordination polymer, namely [Mn(impy)(NH2-pbc)]n (1 NH2-H2pbc = 2-aminoterephthalic acid, impy = 2,6-bis(1-imdazoly)pyridine), has been synthesized through solvothermal reactions of MnCl2, NH2-H2pbc and impy. Single X-ray structural analysis reveals that compound 1 features a 2D layered structure, and th…